Studies on anionic surfactant structure in the aggregation with (hydroxypropyl)cellulose

dc.creatorMartins, Ricardo Martins de
dc.creatorSilva, Carolina A. da
dc.creatorBecker, Cristiane Miotto
dc.creatorSamios, Dimitrios
dc.creatorBica, Clara Ismeria Damiani
dc.creatorChristoff, Marcelo
dc.date2010-04-16T09:10:34Z
dc.date2002
dc.identifier0104-1428
dc.identifierhttp://hdl.handle.net/10183/19545
dc.identifier000333608
dc.descriptionAbstract: Fluorescence probing, viscosity and light scattering measurements have been combined to study the aggregation of different anionic surfactants mainly in dilute solutions (0.5% w/v) of (hydroxypropyl)cellulose (HPC MW 173,000), in moderate ionic strength (NaCl 0.1 mol.L-1). The set of surfactants includes natural cholesterol derivatives, sodium cholate (CS) and sodium deoxycholate (DC), and the alkylsulphate, sodium dodecylsulphate (SDS). At 298 K the critical surfactant concentration related to aggregate/HPC formation (C1) decreases for SDS and DC whereas it increases slightly for CS. At 312 K the C1 values for CS and DC are slightly shifted toward higher values whereas it is not changed for SDS. All surfactant/HPC systems increase C1 values as the HPC concentration increases to 1.2%. Above C1 the viscosity increases for all surfactant/HPC systems but it is sharper in the increasing order CS, DC and SDS. The hydrodynamic behavior indicates that CS induces higher diffusion to HPC than SDS and DC. The aggregation in the surfactant/HPC systems is analyzed through the feature of surfactant/aggregate structure (size, charge density, etc).
dc.formatapplication/pdf
dc.languageeng
dc.relationPolímeros (São Carlos): ciência e tecnologia. São Carlos, SP. Vol. 12, n. 2 (abr./jun. 2002), p. 109-114
dc.rightsOpen Access
dc.subjectAggregate
dc.subjectBile salt
dc.subjectHydrophobic
dc.subject(Hydroxypropyl) Cellulose
dc.subjectFluorescence
dc.subjectLight scattering
dc.subjectViscosity
dc.subjectSurfactantes aniônicos
dc.subjectEspalhamento de luz
dc.titleStudies on anionic surfactant structure in the aggregation with (hydroxypropyl)cellulose
dc.typeArtigo de periódico
dc.typeNacional


Este ítem pertenece a la siguiente institución